Identification of an advanced constitutive model of Magnesium alloy AZ31B

Journal Article · Wed May 04 00:00:00 EDT 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3589725· OSTI ID:21516725

Liu, Z G; Massoni, E ^[1]

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1. CEMEF, Centre de Mise en Forme des Materiaux, Ecole Nationale Superieure des Mines de Paris 1, rue Claude Daunesse, BP 207, 06904, Sophia-Antipolis Cedex (France)

The main aim of this paper is to study the flow behavior of the AZ31B magnesium alloy by means of tensile tests performed in extended ranges of temperature and strain rates. The flow stress-strain curves analyzed by power law type constitutive equation can only fit well with experimental curves at the work-hardening stage. A new mathematical model is studied to describe the softening behavior of material based on tensile experiments. The relative parameters are obtained by fitting the equation with the experimental data. The genetic algorithm has been used to obtain the global optimal fitting parameters. The comparison between the fitted and experimental data proves the effectiveness of the model. The results indicate that this model leads to a better simulation of the flow stress during the softening stage than that of the power law equation. Based on this model, the deep drawing process has been simulated with the commercial finite element code FORGE registered. The punch load and thickness distribution of AZ31 sheet have been studied. The study of the results is helpful to the application of the stamping technology for the magnesium alloy sheet.

• OSTI ID: 21516725
• Journal Information: AIP Conference Proceedings, Vol. 1353, Issue 1; Conference: ESAFORM 2011: 14. international ESAFORM conference on material forming, Belfast, Northern Ireland (United Kingdom), 27-29 Apr 2011; Other Information: DOI: 10.1063/1.3589725; (c) 2011 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALGORITHMS
COMPARATIVE EVALUATIONS
DISTRIBUTION
DRAWING
EQUATIONS
FINITE ELEMENT METHOD
FLOW STRESS
MAGNESIUM ALLOY-AZ31B
SHEETS
SIMULATION
STRAIN HARDENING
STRAIN RATE
STRAINS
THICKNESS
ALLOYS
ALUMINIUM ALLOYS
CALCULATION METHODS
DIMENSIONS
EVALUATION
FABRICATION
HARDENING
MAGNESIUM ALLOYS
MAGNESIUM BASE ALLOYS
MANGANESE ADDITIONS
MANGANESE ALLOYS
MATERIALS WORKING
MATHEMATICAL LOGIC
MATHEMATICAL SOLUTIONS
NUMERICAL SOLUTION
STRESSES
TRANSITION ELEMENT ALLOYS
ZINC ALLOYS